javascript insertion sort

1let insertionSort = (inputArr) => {
2    for (let i = 1; i < inputArr.length; i++) {
3        let key = inputArr[i];
4        let j = i - 1;
5        while (j >= 0 && inputArr[j] > key) {
6            inputArr[j + 1] = inputArr[j];
7            j = j - 1;
8        }
9        inputArr[j + 1] = key;
10    }
11    return inputArr;
12};

1const insertionSort = (inputArr) => {
2  const {length} = inputArr;
3  const retArray = inputArr;
4  for (let i = 1; i < length; i++) {
5    const key = inputArr[i];
6    let j = i - 1;
7    while (j >= 0 && inputArr[j] > key) {
8      retArray[j + 1] = inputArr[j];
9      j -= 1;
10    }
11    retArray[j + 1] = key;
12  }
13  return retArray;
14};
15insertionSort([10, 9, 8, 7, 6, 5, 4, 3, 2, 1])

1function insertionSort(inputArr) {
2    let n = inputArr.length;
3        for (let i = 1; i < n; i++) {
4            // Choosing the first element in our unsorted subarray
5            let current = inputArr[i];
6            // The last element of our sorted subarray
7            let j = i-1; 
8            while ((j > -1) && (current < inputArr[j])) {
9                inputArr[j+1] = inputArr[j];
10                j--;
11            }
12            inputArr[j+1] = current;
13        }
14    return inputArr;
15}

1const insertionSort = array => {
2  const arr = Array.from(array); // avoid side effects
3  for (let i = 1; i < arr.length; i++) {
4    for (let j = i; j > 0 && arr[j] < arr[j - 1]; j--) {
5      [arr[j], arr[j - 1]] = [arr[j - 1], arr[j]];
6    }
7  }
8  return arr;
9};
10
11console.log(insertionSort([4, 9, 2, 1, 5]));
12